Central, Inscribed, and Circumscribed Angles Central angles, circumscribed angles, and inscribed angles are created and outside of a circle by tangent segments. A chord is a segment that has radii, chords, and two that are on the circle. A tangent segment has an endpoint at the point of tangency. 4 . " Central angles are created by two radii. They have a vertex at the of the circle. The endpoints are on the circle and the sides are congruent C